Author:Otto Henker
Ph.D. Staff member at Zeiss in Jena. Head of the newly established "Medical Optical Instruments" and "Eyeglass" departments from 1912.[1]
This author wrote articles for the 1911 Encyclopædia Britannica
Articles written by this author are designated in the EB1911 by the initials "O. Hr."
Otto Henker
Works edit
- "Binocular Instrument," in Encyclopædia Britannica (11th ed., 1911)
- "Lens," in Encyclopædia Britannica (11th ed., 1911)
- "Microscope," in Encyclopædia Britannica (11th ed., 1911)
References edit
- ↑ http://www.zeiss.de Company History: Otto Henker
Some or all works by this author are in the public domain in the United States because they were published before January 1, 1929.
This author died in 1926, so works by this author are in the public domain in countries and areas where the copyright term is the author's life plus 97 years or less. These works may be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works.
Public domainPublic domainfalsefalse